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https://wiki.csiamerica.com/display/kb/Manual+multi-support+excitation
May 22, 2017 · Once the displacement time-history record is obtained from an acceleration record, ground motion may be applied to specific support restraints through manual multi-support excitation, described as follows:. At joints of interest, define a load pattern.This load pattern should apply unit values of joint displacement in the direction of applied acceleration.
http://opensees.berkeley.edu/wiki/index.php/Multi-Support_Excitation_Pattern
The Multi-Support pattern allows similar or different prescribed ground motions to be input at various supports in the structure. In OpenSees, the prescribed motion is applied using single-point constraints, the single-point constraints taking their constraint value from user created ground motions.
https://midassupport.jitbit.com/helpdesk/KB/View/22452202-multiple-support-excitation
Do you have any manual or explanation regarding the usage of the Multiple Support Excitation function? There is an user that would like to apply the function, but I am not sure of how to use it. In terms of constraints of the nodes and so on.
https://www.researchgate.net/publication/322095934_THE_EFFECT_OF_MULTIPLE_SUPPORT_EXCITATION_OF_BRIDGE_STRUCTURES_FOR_SEISMIC_RESPONSE_ANALYSIS
THE EFFECT OF MULTIPLE SUPPORT EXCITATION OF BRIDGE STRUCTURES . FOR SEISMIC RESPONSE ANALYSIS . Z. A. Munsoor 1, V. Meeruja 1 and J. A. …
https://www.unipa.it/dipartimenti/ingegneria/.content/documenti/documenti-dicam/7.pdf
uniform support excitation.Making use of modal analysis, e.g., it becomes necessary to introduce time-dependent participation factors. For stationary random multiple support excitation an approximate procedure, the Pseudo Excitation Method is introduced, which includes the main effects of wave passage and site response. REFERENCES
http://manual.midasuser.com/EN_TW/civil/791/Start/05_Load/06_Time_History_Analysis_Data/Multiple_Support_Excitation.htm
Multiple Support Excitation : In a structure with multiple supports, different time history forcing functions in terms of ground acceleration can be applied to different supports. In cases of long-span bridges (suspension bridge or cable stayed bridge), when the distance between the supports of a substructure is large, arrival time of seismic ...
https://www.researchgate.net/publication/228665890_Experimental_modelling_of_multiple_support_excitations_of_long_span_bridges
This paper will include corroborative experimental data using the multiple support excitation rig. The multiple support excitation rig is a series of five single-axis shaking tables each at a ...
http://iopscience.iop.org/article/10.1088/0964-1726/4/3/001/pdf
multiple support excitation has been performed by Xu eta1 (1994). In their study, the bridge structure is modeled as a 2D flexural beam while the control system is represented by active tuned mass dampers at various locations. It appears that multiple support excitation plays a key role in the structural response of extended structures ...
http://opensees.berkeley.edu/community/viewtopic.php?p=78809
Apr 24, 2012 · I have a question about analyzing multi support excitation. To analyze multi support excitation problem, Opensees allows input data as displacement instead acceleration for the accuracy. But based on Dynamics of structure (9.7) written by Chopra, we …
https://www.sciencedirect.com/science/article/pii/S014102969600020X
The effect of multiple support excitation on the response of overhead power transmission lines is analysed. The transmission towers are modelled by space truss elements, while the cable is modelled by straight two node elements that account for the nonlinear geometry of the cable.Cited by: 59
https://boffi.github.io/dati_2017/08/handout.pdf
I For a xed excitation frequency and high modal frequencies the frequency ratio ! 0. I For ! 0 the response is quasi-static . I Hence, for higher modes the response is pseudo-static . I On the contrary, for excitation frequencies high enough the lower modes respond with purely inertial forces. Truncation Num. Integration Support Exc. Giacomo Bo
https://www.sciencedirect.com/science/article/pii/S0267726119309054
This paper presents a novel, bridge-dependent approach for quantifying the increase of design quantities due to spatially variable earthquake ground m…
https://www.tandfonline.com/doi/abs/10.1080/15732479.2014.977302
The 395 m long Evripos bridge in central Greece connects the island of Evia to the mainland. An accelerometer array of 43 triaxial sensors has been monitoring both the free-field excitation and the response of the superstructure in a series of seismic events since 1994. This paper focuses on the characteristics of the spatially variable earthquake ground motions (SVEGMs) recorded during two ...
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.535.4863
CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Eurocode 8 Pt 2 recommends that bridges longer than 400m, or bridges built on significantly varying ground types, should be assessed under the effects of multiple support excitation (MSE). However, previous analytical work has suggested that for shorter bridges MSE can also have an effect on the response.
https://ascelibrary.org/doi/full/10.1061/%28ASCE%29EM.1943-7889.0000394
Jul 07, 2012 · Substructure hybrid simulation of engineering structures subjected to multiple-support excitation (MSE) is investigated. In time-history analysis of MSE problems, the equations of motion are generally posed in relative coordinates (designated EOM …
https://boffi.github.io/dati_2016/09/handout.pdf
Multiple Support Excitation Lanczos Vectors The Lanczos vectors are obtained in a manner that is similar to matrix iteration and are constructed in such a way that each one is orthogonal to all the others. Usually each new vector must be orthogonalised with respect to all the other vectors, lots of work...
https://ieeexplore.ieee.org/abstract/document/8666783
Similarly, multiple transmit coils have been shown to accelerate and refine the RF excitation. In this paper, we investigate the optimization of the total imaging time and image accuracy when considering both the transmit and receive coil arrays; we term this strategy as multiple-input- multiple …
https://searchworks.stanford.edu/view/xp493yh8925
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https://www.amazon.com/Modeling-control-cable-stayed-multiple-support-excitation/dp/B0006QRLR8
Modeling and active control of cable-stayed bridges subject to multiple-support seismic excitation (Report) [Armin G Schemmann] on Amazon.com. *FREE* shipping on qualifying offers.Author: Armin G Schemmann
https://ieeexplore.ieee.org/document/5774597/
Abstract: The seismic responses of two large-span space structures under multiple-support excitation and simple-support excitation were respectively analyzed, and the structural responses, which include the internal force, displacement, acceleration and so on, were contrastively studied under the two forms of earthquake loads. The results show that multiple support excitation on long-span ...
https://link.springer.com/article/10.1007/s13296-018-0069-z
The purpose of the study is to determine the effects of multiple support excitations (MSE) and soil–structure interaction (SSI) on the dynamic characteristics of cable-stayed bridges founded on pile foundation groups. In the design of these structures, it is important to consider the effects of spatial variability of earthquake ground motions.
https://link.springer.com/chapter/10.1007%2F978-3-319-43080-5_15
Nov 12, 2016 · Multiple support excitations of elastic multi-span beams are studied. Based on the common set of equations of motion an efficient formulation is developed in order to reduce the degrees of freedom. The resulting equations are formally identical to those that are valid for structures under uniform support excitations.
http://iopscience.iop.org/article/10.1088/0964-1726/4/3/001
This paper analyzes the feasibility and efficiency of active tendon control systems for the vibration control of structures subjected to multiple support excitation. This type of external excitation can be used to represent, for example, earthquake-induced spatially varying ground motion.
https://www.mayoclinic.org/diseases-conditions/multiple-sclerosis/symptoms-causes/syc-20350269
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